Fix it or keep topping off, truthfully I don’t know the technique used by refridgerant stop leak products but you do want to think of the future and keep you AC system free of products it is not designed for. In reality this big of a leak should be easy to find with an electronic leak detector, or is finding the leak not the problem?

Thanks Old school, Ken Green and Oblivion. I learnt from you folks that car A/C system should be repaired and fixed and should not use “Stop Leak” which might permanently “Stop my Car A/c” Thanks Guys.

If the vehicle is a junker and you live some place where A/C is optional, by all means try the stop leak. It probably won’t work and it may well make things worse. But if you aren’t going to pay to get the A/C fixed, what have you got to lose? Otherwise, I wouldn’t go near the stuff unless – and this is very unlikely – your A/C repair guy recommends it.